Vent-stopper for pumps



(No Model.)

R. G. JOHNSTON 8v G.. A. BUFFINGTO-N.

VENT STOPPER POB. PUMPS.

. Patented Dec. 27, 1887.

Wl TJVESSES Attorney N. PETeRs, mmm-umgwmw. wnshanmun, u c.

use the same, reference being had to the ac- UNITED STATES PATENTOEEICE.

ROBERT G. JOHNSTON AND GEORGE A. BUFFINGTON, OF ORCHARD, NEBRASKA.

vENT-sTOPPl-:R FOR PUMPS.

SLPECIFICATION forming part of Letters Patent No. 375,635, datedDecember 27, 1887.

Application led July 21, 188'?. Serial No. 244,910. (No model.) v

To afZZ whom it may concern.-

Be it known that we, ROBERT G. JOHNSTON and GEORGE A. B-UEEINGTON,citizens of the United States of America, residing at Orchard, in thecounty lof Antelope and State of Nebraska, have invented certain new anduseful Improvements in Vent-Stoppers for Pumps; and we do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art .to which itappertains to make and companying drawings, and to letters or figures ofreference marked thereon, which form a part of this specification. l

Our invention relates to certain new and useful improvements in ventStoppers for pumps, the object of our invention being to provide acheap, simple, and effective means whereby the water can be let out ofthe pumpstock, so as to prevent the pipe Or stock bursting, which wouldbe occasioned by the water freezing therein, our improvement beingadapted to be applied to metal tubes which are used for pumpstocks, oron pumpstocks of ordinary construction.

In theacoompanying drawings, which illustrate our invention, Figure l isa view showing our improved vent-stopper applied to a pump of ordinaryconstruction. Fig. 2 is a longitudinal sectional View, and Fig. 3 is atransverse sectional View taken through the line x .fr of Fig. 2.

A refers to the pump, which is suitably connected to the pumpstock orwelltube B, which is usually a metal tube. The pump pipe or stock A mayhave pivoted thereto, as shown in Fig. l, a bell-crank lever, a, whichis adapted to be turned upon its pivot by the foot of the person whooperates the pump. This bell-crank lever may be provided with anautomatic catch, or a catch of any suitable constructionas a pin forholding the same in positionso as to maintain the ventlstopper in anelevated position. The opposite end of the bell-crank lever a isconnected to the rod or wire (rust-proof) C. Said lever becomes aself-locker by the end to which the wireis attached passing a littlepast the perpendicular when raised.

D refers to a metallic plate, which is curved centrally, so as toembrace a portion ofthe well-tube B, said plate .being provided withside anges, d d, which are perforated at suitable intervals for thereception of metallic straps E, F, and G, which vare bolted to the plateD, so as maintain said plate in position upon the tube or pump-pipe B.The tube or pump stock or pipe B has at a suitable distance from thepump, below the freezing-point 6o or just above the cylinder, a vent, c.The strap is provided centrally with a projecting portion, e, into whichpasses the rod C, said rod carrying beneath the strap E a washer, f,against which abuts a spiral spring, H, the opposite end of said springabutting against the upper surface of the wedge-shaped sliding valve I.The straps F and G each serve as guides for the edgeshaped sliding valveI, and the projecting portion of these straps ta- 7o per or arewedge-shaped, so as to conform with the wedge-shaped valve. Thewedge-shaped valve l. is provided on its surface adjacent to the pumpstock or tube B with a packing, t', which is suitably secured thereto.Saidvalve is of such a length that the upward movement of the rod Gcannot displace the same from the guides. The lower end of the valve Iis of much less thickness than the upper portion, the inner side thereofbeing cut away or re- 8o moved, so that when the sliding valve iselevated the vent will be uncovered. The vent is located near the lowervalve in the pump tube or stock. v

We are aware that prior to our invention it has been proposed toconstruct vent-stoppers having a sliding gate which is connected to arod, so that when said gate is elevated by the rod the vent will beopened; also, that it has been proposed to construct vent-Stoppers 9owith spiral spring for holding thegate or slide down over the vent inthe pump, and we do not claim such construction as our invention; but

What we claim as new, and desire to secure by Letters Patent, is-

In a Vent-stopper forpnmptubes, the plate In testimony whereof We afxour signatures 1o D, having side anges, straps E, F, and G, foi1 l inpresence of two Witnesses. holding said plate in position upon the pumppipe or stock said straps having oentraliy- ROBERT G. JOHNSTON.projecting portions, the projecting portions GEORGE A. BUFFINGTON. ofthe straps F and G being tapered, and a.

wedge-shaped sliding valve and an operating- Vitnesses:

rod,substantiallyas shown, and for the purpose JOHN G. CLoSSoN,

set forth. i W. N. CLossoN.

